US4230946A
Expired / Lapsed
US
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Cryogenic collimator apparatus and method
Assignee: University of Utah Research Foundation Inc
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Filing: 1979-03-19
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Granted: 1980-10-28
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Expires: 1999-03-19
Abstract
Abstract A cryogenic collimator apparatus and method for collimating pyrolysis fragments produced by a pyrolysis unit. The apparatus includes a cryogenic plate having an aperture therein, the plate being adapted to be interposed between the pyrolysis unit and an ionization center so that the aperture is in a direct line between the pyrolysis unit and the ionization center. The method includes using the cryogenic plate for trapping pyrolysis fragments not passing through the aperture directly from the pyrolysis unit.
Inventors
- 👤 Gregory J. Wells
- 👤 Kent J. Voorhees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:16
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/06; H01J49/067; H01J49/04; H01J49/0468; H01J49/0472
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
An improved ion source for a mass spectrometer wherein pyrolysis fragments from a pyrolysis unit are directed into an ionization center for ionization and the ionized particles of pyrolysis fragments are directed into the mass spectrometer for analysis, the improvement comprising a cryogenic means having an aperture therethrough, the cryogenic means being adapted to be placed adjacent the pyrolysis unit with the aperture in a direct line between the pyrolysis unit and the ionization center, the cryogenic means thereby holding pyrolysis fragments impinging thereon with the aperture collimating pyrolysis fragments from the pyrolysis unit into the ionization center.
Claim 2
Dependent Claim
98 words
An improved ion source for a mass spectrometer wherein pyrolysis fragments from a pyrolysis unit are directed into an ionization center for ionization and the ionized particles of pyrolysis fragments are directed into the mass spectrometer for analysis, the improvement comprising a cryogenic means having an aperture therethrough, the cryogenic means being adapted to be placed adjacent the pyrolysis unit with the aperture in a direct line between the pyrolysis unit and the ionization center, the cryogenic means thereby holding pyrolysis fragments impinging thereon with the aperture collimating pyrolysis fragments from the pyrolysis unit into the ionization center.
Claim 3
Dependent Claim
31 words
The improvement of claim 1 wherein the aperture comprises a recess adjacent the pyrolysis unit, the recess accommodating adjustably orienting the pyrolysis unit relative to the aperture in the cryogenic means.
Claim 4
Dependent Claim
20 words
The improvement of claim 1 wherein the cryogenic means comprises a metal plate in thermal contact with a cryogenic source.
Claim 5
Dependent Claim
66 words
A collimator apparatus for collimating pyrolysis fragments between a pyrolysis unit and an ionization center comprising: cryogenic means adapted to be interposed between the pyrolysis unit and the ionization center, the cryogenic means having an aperture for placement in a direct line between the pyrolysis unit and the ionization center, the aperture collimating pyrolysis fragments passing therethrough and the cryogenic means holding pyrolysis fragments impinging thereon.
Claim 6
Dependent Claim
66 words
A collimator apparatus for collimating pyrolysis fragments between a pyrolysis unit and an ionization center comprising: cryogenic means adapted to be interposed between the pyrolysis unit and the ionization center, the cryogenic means having an aperture for placement in a direct line between the pyrolysis unit and the ionization center, the aperture collimating pyrolysis fragments passing therethrough and the cryogenic means holding pyrolysis fragments impinging thereon.
Claim 7
Dependent Claim
22 words
The collimator apparatus defined in claim 4 wherein the cryogenic means comprises a metal plate in thermal contact with a cryogenic source.
Claim 8
Dependent Claim
33 words
The collimator apparatus defined in claim 5 wherein the aperture comprises a recess in the plate adjacent the pyrolysis unit, the recess being formed as a diametrally enlarged slot adjacent the pyrolysis unit.
Claim 9
Independent Claim
97 words
A method for collimating pyrolysis fragments produced by a pyrolysis unit comprising: obtaining a cryogenic means, the cryogenic means including a cryogenic source; forming an aperture in the cryogenic means; placing the cryogenic means adjacent the pyrolysis unit with the aperture in juxtaposition with the pyrolysis unit; emitting pyrolysis fragments from the pyrolysis unit by heating a sample in the pyrolysis unit; and collimating pyrolysis fragments emitted from the pyrolysis unit by allowing a portion of the pyrolysis fragments to pass through the aperture while capturing the remainder of the pyrolysis fragments impinging on the cryogenic means.
Claim 10
Independent Claim
97 words
A method for collimating pyrolysis fragments produced by a pyrolysis unit comprising: obtaining a cryogenic means, the cryogenic means including a cryogenic source; forming an aperture in the cryogenic means; placing the cryogenic means adjacent the pyrolysis unit with the aperture in juxtaposition with the pyrolysis unit; emitting pyrolysis fragments from the pyrolysis unit by heating a sample in the pyrolysis unit; and collimating pyrolysis fragments emitted from the pyrolysis unit by allowing a portion of the pyrolysis fragments to pass through the aperture while capturing the remainder of the pyrolysis fragments impinging on the cryogenic means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |